The study revealed that LC50 values and LC90 values for extracellular crude metabolites for two fungal species were lower than the values obtained for extracellular aqueous extracts. All the LC50 values obtained for Aedes albopictus were lower than that of Aedes aegypti. LC50 values obtained for Trichoderma viride aqueous extracellular metabolites were 81.46 gL⁻¹ and 87.75 gL⁻¹in 24 hours, 70.66 gL^-1 and 77.93 gL⁻¹ in 48 hours for Aedes albopictus and Aedes aegypti respectively. LC50 values obtained for Trichoderma longibrachiatum aqueous extracellular metabolites were recorded as 103.35gL⁻¹ and 108.79gL⁻¹ in 24 hours and 93.05gL⁻¹ and 102.1gL⁻¹ in 48 hours for Ae. albopictus and Ae.  aegypti respectively. It was revealed that LC50 values obtained for T.viride crude extracellular metabolites were 34.42gL⁻¹ and 47.27gL⁻¹ in 24 hours, 30.29gL⁻¹ and 41.56gL⁻¹ in hours for Ae.albopictus and Ae.aegypti respectively. LC50 values obtained for T.longibrachiatum crude extracellular metabolites were 49.84gL⁻¹ and 59.24gL⁻¹ in 24 hours, 40.73gL⁻¹ and 51.49gL⁻¹ in 48 hours for Ae.albopictus and Ae.aegypti respectively. It can be concluded that there is a potential for using T.viride as an effective larvicide against dengue mosquitoes.

  Dinusha S Perera , W G Hiruni Tharaka , Deepika Amarasinghe , Suranga R Wickramarachchi

Acta Tropica

Abstract :- https://doi.org/10.1016/j.actatropica.2022.106747